import java.util.concurrent.locks.ReentrantLock;

/**
 * @author gao
 * @date 2025/8/4 21:20
 */

public class Demo3 {
    private static int count = 0;
    public static void main(String[] args) throws InterruptedException {
        ReentrantLock locker = new ReentrantLock();

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50_000; i++) {
                locker.lock();
                count++;
                locker.unlock();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50_000; i++) {
                locker.lock();
                count++;
                locker.unlock();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();
        System.out.println(count);
    }
}